# Voltage Comparator circuit

Voltage Comparator circuit:-   A fixed reference voltage Vref  is applied to the (-) input, and the other time – varying signal voltage Vin is applied to the (+) input; Because of this arrangement, the circuit is called the non-inverting comparator.  Depending upon the levels of Vin and Vref the circuit produces output.  In short, the comparator is a type of analog-to-digital converter.

At any given time the output waveform shows whether Vin is greater or less than Vref.  The comparator is sometimes also called a voltage-level detector because, for a  desired value of Vref, the voltage level of the input Vin can be detected.

• A fixed reference voltage Vref is applied to the (-) input, and to the other input a varying voltage Vin.
• Vary the input voltage above and below the Vref  and note down the output at pin 6 of 741 IC.
• Observe that, when Vin less than Vref, the output voltage is -Vsat ( @ – VEE)
•  when Vin is greater than Vref­, the output voltage is +Vsat (@+VCC).

Comparator Calculation:

• If Vin < Vref, Vo = -Vsat @ – VEE
• Vin > Vref, Vo = +Vsat = +VCC.

 Vin V Ref=v V = o/p 3 .75 +10 6 7.2 -10.5
##### Subramanian

Subramanian MK, currently serving as a workshop instructor at Sakthi Polytechnic College, Erode Tamil Nadu. With a career spanning 25 + years, Subramanian MK has dedicated himself to advancing knowledge in Electronics and Communication Engineering (ECE). His passion for exploring new technologies has led to the development of numerous projects, showcasing expertise in IoT and PCB design.

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